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5-2E
Repair manual KTM MINI 50 air/liquid cooled Art.-Nr. 3.206.028 -E
Working on the right half of the engine case
Remove shaft sealing ring 1 and heat the engine case half on a heating
plate to approx. 150° C.
NOTE: if the engine case is heated to 150° C and struck on a wooden
surface, the bearings usually fall out of the bearing seats automatically.
If necessary, the bearings must be pushed out.
!
CAUTION
!
–ALWAYS REMOVE DOWELS FIRST TO PREVENT THE CASE FROM BEING DAMAGED.
–T
HE DEVICES (MANDRELS) TO PRESS THE NEW BEARINGS IN PLACE SHOULD BE
DESIGNED SUCH THAT THEY ONLY REST ON THE OUTER RING OF THE BEARING
,
OTHERWISE THE BEARINGS WILL BE DAMAGED WHEN FITTED.
Grooved ball bearing for crankshaft
2
Use a suitable mandrel to press the grooved ball bearing into place.
Press the new grooved ball bearing all the way in.
NOTE: the grooved ball bearing of the crankshaft will protrude approx.
1 mm from the surface of the case.
Grooved ball bearing for output shaft
3
Use a suitable mandrel to press the grooved ball bearing into place.
Press the new grooved ball bearing all the way in.
NOTE: the grooved ball bearing of the output shaft should fit flush with
the surface of the case.
Shaft sealing ring for crankshaft
1
Press a new shaft sealing ring into place with the sealing lip to the
inner side.
NOTE: the seal shaft ring will fit approx. 1 mm lower than the surface
of the case.
After the engine case halves have cooled, check all bearings for firm
retention in the bearing seats.
Finally, check the greasing hole
S for the grooved ball bearing of the
crankshaft and the connection for the gearbox ventilation for clearance.